There are several bugs in the testsuite:
1) You cannot call cyp((x,y)) with double parantheses (occures twice)
2) for x='97256528638204' the string is too short. Likely there is a leading zero missing.
A few of the errors have been fixed, but this problem is too cryptic (or erroneous) for me to understand it, so I can't completely fix it. @Sibi, please fix the problem. I would highly recommend providing your own reference solution on the Edit page to ensure that it is working properly.
Remove the polynomials that have positive real elements of their roots.
Nonuniform quantizer as a piecewise constant function
Convert from Base 10 to base 5
Decipher the number 3 - 10 keys
Cipher or Decipher the number according to the second input - 3 keys - order [1 2 3 2 1 2 3 ......]
Decipher the message - 3 key
Cipher or Decipher the number according to the second input - 1 key for all digits
Find the magnetic field around the wire
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